Wearable Display System That Displays Previous Runners as Virtual Objects on a Current Runner's Path

1. A display control device comprising: circuitry configured to: acquire, at an action position of one actor, action information regarding a past action of another actor; generate a virtual object for virtually indicating a position of the other actor during an action of the one actor based on the acquired action information; cause a display displaying a surrounding scene to superimpose and display the generated virtual object during the action of the one actor; determine whether the other actor is located at a position within a visual field of the one actor who is acting; cause the display to display the virtual object when the other actor is determined to be located at the position within the visual field; cause the display to superimpose and display a map showing positions of the one actor and the other actor when the other actor is determined to not be located at the position within the visual field and the other actor is distant from the one actor by a predetermined distance or greater, wherein actions of the one actor and the other actor are running actions on a road; identify a range of the road from a captured image that images the visual field of the one actor; and determine that the other actor is located at the position within the visual field when the other actor is located within the identified range of the road.

2. The display control device according to claim 1 , wherein the circuitry is configured to cause the display to transparently display the generated virtual object.

3. The display control device according to claim 1 , wherein the circuitry is configured to: detect a direction of a sight line of the one actor; and switch display of the virtual object in the display in accordance with the detected direction of the sight line.

4. The display control device according to claim 3 , wherein the circuitry is configured to cause the display to display the virtual object when the other actor is acting in front of a traveling direction of the one actor and the sight line of the one actor is oriented toward the front.

5. The display control device according to claim 3 , wherein the circuitry is configured to cause the display to display the virtual object when the other actor is acting in rear of a traveling direction of the one actor and the sight line of the one actor is oriented toward the rear.

6. The display control device according to claim 1 , wherein the circuitry is configured to: cause the display to display the virtual object when the one actor is determined to start a running action.

7. The display control device according to claim 1 , wherein the circuitry is configured to cause the display not to display the virtual object when a shielding object is present between the one actor and the other actor from a view of the one actor.

8. The display control device according to claim 1 , wherein the circuitry is configured to acquire the action information and map information including information regarding altitude of a position at which the other actor acts.

9. The display control device according to claim 1 , wherein the display is a glasses-type display mounted on the one actor.

10. A display control method comprising: acquiring, at an action position of one actor, action information regarding a past action of another actor; generating a virtual object for virtually indicating a position of the other actor during an action of the one actor based on the acquired action information; causing a display displaying a surrounding scene to superimpose and display the generated virtual object during the action of the one actor; determining whether the other actor is located at a position within a visual field of the one actor who is acting; causing the display to display the virtual object when the other actor is determined to be located at the position within the visual field; causing the display to superimpose and display a map showing positions of the one actor and the other actor when the other actor is determined to not be located at the position within the visual field and the other actor is distant from the one actor by a predetermined distance or greater, wherein actions of the one actor and the other actor are running actions on a road; identifying a range of the road from a captured image that images the visual field of the one actor; and determining that the other actor is located at the position within the visual field when the other actor is located within the identified range of the road.

11. A non-transitory computer readable medium having a computer program recorded thereon, the computer program configured to perform a method when executed on a computer, the method comprising: acquiring, at an action position of one actor, action information regarding a past action of another actor; generating a virtual object for virtually indicating a position of the other actor during an action of the one actor based on the acquired action information; causing a display displaying a surrounding scene to superimpose and display the generated virtual object during the action of the one actor; determining whether the other actor is located at a position within a visual field of the one actor who is acting; causing the display to display the virtual object when the other actor is determined to be located at the position within the visual field; causing the display to superimpose and display a map showing positions of the one actor and the other actor when the other actor is determined to not be located at the position within the visual field and the other actor is distant from the one actor by a predetermined distance or greater, wherein actions of the one actor and the other actor are running actions on a road; identifying a range of the road from a captured image that images the visual field of the one actor; and determining that the other actor is located at the position within the visual field when the other actor is located within the identified range of the road.